Question

what is the probability that of 2 randomly selected traffic at alleys in 2009 at least one was alcohol related

Answer 1

solution:

in 2009 number of traffic fatalities that occured were 33722 out of these 9817 were alcohol related P(alcohol related) = 9817/33722 = 0.291

the probability that of 2 randomly selected traffic at alleys in 2009 at least one was alcohol related=1-p(neither of the two randomly selected traffic fatality was alcohol related)

P(not alcohol related) = 1 - 0.291 = 0.709

P(neither of the two are alcohol related)=0.709*0.709

= 0.5026

P(at least one was alcohol related)=1-0.5026

= 0.4973